| Atlantic Communications | LTR | Standard | Various | Multi-County [11] | 2024-02-24 |
| Atlantic Communications | DMR | Conventional Networked | Various | Multi-County [2] | 2024-02-24 |
| Biddeford Municipal Trunk | Project 25 | Phase II | Biddeford | York | 2023-02-13 |
| Central Maine Power | LTR | Standard | Various | Multi-County [11] | 2024-02-24 |
| County Communications | NXDN | NEXEDGE 9600 | Boston | Multi-County [5] | 2023-10-07 |
| FPL ENERGY WYMAN LLC | DMR | Motorola Capacity Plus Single Site (TRBO) | South Portland | Cumberland | 2021-03-17 |
| General Dynamics-Bath Iron Works | DMR | Motorola Capacity Plus Single Site (TRBO) | Bath, Maine | Sagadahoc | 2023-06-20 |
| Hussey Communications (Sugarloaf Mountain) | LTR | Standard | Sugarloaf Mountain | Franklin | 2005-01-29 |
| Hussey Communications (Winslow) | LTR | Standard | Winslow | Kennebec | 2005-01-29 |
| Hussey Communications (York Hill-New Sharon) | LTR | Standard | York Hill-New Sharon | Franklin | 2005-01-29 |
| Industrial Communications (Buckfield) | Motorola | Type II | Buckfield | Oxford | 2008-09-08 |
| Industrial Communications and Electronics | DMR | Motorola Connect Plus (TRBO) | Regional | Multi-County [16] | 2024-04-04 |
| Industrial Communications and Electronics (Portland) | Motorola | Type II | Portland | Cumberland | 2008-12-10 |
| Industrial Communications and Electronics (York) | Motorola | Type II Smartnet | York | York | 2011-10-25 |
| Lepage Bakeries | DMR | Conventional Networked | Lewiston | Androscoggin | 2019-02-05 |
| Lewiston and Auburn | Project 25 | Phase II | Auburn | Androscoggin | 2023-01-17 |
| Maine Radio | DMR | Motorola Connect Plus (TRBO) | Various | Multi-County [6] | 2019-03-28 |
| Maine Radio LTR | LTR | Standard | Blackstrap Hill | Multi-County [2] | 2021-03-17 |
| Maine State Communications Network (MSCommNet) | Project 25 | Phase I | Statewide | Statewide | 2023-08-10 |
| MedComm | DMR | Motorola Capacity Plus Multi Site (TRBO) | Various | Multi-County [5] | 2023-06-26 |
| Mid-Coast Maine LTR | LTR | Standard | Midcoast | Multi-County [2] | 2016-01-16 |
| Nextel (Eddington) | LTR | Standard | Eddington | Penobscot | 2008-10-12 |
| Portland (P25) | Project 25 | Phase I | Portland | Cumberland | 2022-06-22 |
| RCM Communications (Hytera XPT) | DMR | Hytera XPT | Portland | Multi-County [5] | 2022-03-08 |
| RCM Communications (VHF) | LTR | Standard | Falmouth | Cumberland | 2021-03-01 |
| United States Department of Defense (14C) | Project 25 | Phase I | Nationwide | Multi-County [62] | 2024-04-19 |
| Westbrook Schools | DMR | Motorola Capacity Plus Single Site (TRBO) | Westbrook | Cumberland | 2021-03-04 |
